GATE ME

First Law of Thermodynamics

Thermodynamics

(Past Years Questions)

Marks 1

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Water (density $$ = 1000$$ $$kg/{m^3}$$) at ambient temperature flows through a horizontal pipe of uniform cross section...
GATE ME 2017 Set 1
A gas contained in a cylinder is compressed, the work required for compression being $$5000$$ $$kJ.$$ During the process...
GATE ME 2004
A $$2$$ $$kW,$$ $$40$$ liter water heater is switched on for $$20$$ minutes. The heat capacity $${C_p}$$ for water is $$...
GATE ME 2003
A steam turbine receives steam steadily at $$10$$ $$bar$$ with an enthalpy of $$3000$$ $$kJ/kg$$ and discharges at $$1$$...
GATE ME 2000
A steel ball of mass $$1$$ $$kg$$ and specific heat $$0.4$$ $$kJ/kg$$ is at temperature of $${60^ \circ }C.$$ It is drop...
GATE ME 1999
The first law of thermodynamics takes the form $$W = - \Delta \,H$$ when applied to :
GATE ME 1993

Marks 2

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A calorically perfect gas (specific heat at constant pressure $$1000$$$$J/kg.K$$) enters and leaves a gas turbine with t...
GATE ME 2017 Set 2
One $$kg$$ of an ideal gas (gas constant, $$R = 400$$ $$J/kg.K;$$ specific heat at constant volume, $${c_v} = 1000\,J/kg...
GATE ME 2017 Set 1
Steam at an initial enthalpy of $$100$$ $$kJ/kg$$ and inlet velocity of $$100$$ $$m/s,$$ enters an insulated horizontal ...
GATE ME 2016 Set 3
A piston-cylinder device initially contains $$0.4\,{m^3}$$ of air (to be treated as an ideal gas) at $$100$$ $$kPa$$ and...
GATE ME 2016 Set 2
Work is done on an adiabatic system due to which its velocity changes from $$10$$ $$m/s$$ to $$20$$ $$m/s,$$ elevation i...
GATE ME 2015 Set 2
A well insulated rigid container of volume $$1{m^3}$$ contains $$1.0$$ $$kg$$ of an ideal gas $$\left[ {{C_p} =1000\,\,\...
GATE ME 2015 Set 1
Specific enthalpy and velocity of steam at inlet and exit of a steam turbine, running under steady state, are as given b...
GATE ME 2013
Steam enters an adiabatic turbine operating at steady state with an enthalpy of $$3251.0kJ/kg$$ and leaves as a saturate...
GATE ME 2012
Air enters an adiabatic nozzle at $$300$$ $$kPa,$$ $$500$$ $$K$$ with a velocity of $$10$$ $$m/s.$$ It leaves the nozzle...
GATE ME 2012
Air enters an adiabatic nozzle at $$300$$ $$kPa,$$ $$500$$ $$K$$ with a velocity of $$10$$ $$m/s.$$ It leaves the nozzle...
GATE ME 2012
The temperature and pressure of air in a large reservoir are $$400$$ $$K$$ and $$3$$ bar respectively. A converging dive...
GATE ME 2011
The temperature and pressure of air in a large reservoir are $$400$$ $$K$$ and $$3$$ bar respectively. A converging dive...
GATE ME 2011
A balloon containing an ideal gas is initially kept in an evacuated and insulated room. The balloon ruptures and the gas...
GATE ME 2008
A rigid, insulated tank is initially evacuated. The tank is connected with a supply line through which air ( assumed to ...
GATE ME 2008
What is the speed of sound in Neon gas at a temperature of $$500$$ $$K$$ (Gas constant of Neon is $$0.4210$$ $$kJ/kg$$-$...
GATE ME 2002
A small steam whistle (perfectly insulated and doing no shaft work) causes a drop of $$0.8$$ $$kJ/kg$$ in the enthalpy o...
GATE ME 2001
When an ideal gas with constant specific heats is throttled adiabatically, with negligible changes in kinetic and potent...
GATE ME 2000
A rigid insulated cylinder has two compartments separated by a thin membrane. While one compartment contains one kmol ni...
GATE ME 1993

Marks 5

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A certain mass of a pure substance undergoes an irreversible process from state $$1$$ to state $$2,$$ the path of the pr...
GATE ME 2000
Air enters a frictionless adiabatic converging nozzle at $$10$$ bar, $$500$$ $$K$$ with negligible velocity. The nozzle ...
GATE ME 1997

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